Means for adjusting cross-hairs of telescopic sights.



No. 736,541. PATENTBD AUG. .18, 1903.

A. W. PETERSON. MEANS FOR ADJUSTING (moss HAIRS 0F TELBSGOPIG SIGHTS.

APPLICATION FILED NOY. 21. 1902.

No. 736,541. PATBNTED AUG. 18, 1903.

' A. W. PETERSON. MEANS FOR ADJUSTING moss HAIRS' 0F TELESGOPIG SIGHTS.

APPLICATION FILED NOV. 21. 1902. NO MODEL; 2 SHEETS-SHEBT 2.

I'll IIIIIIIIIIIIIIIIIIA 'NITED STATES Patented August 18, 1903.

PATENT OFFICE.

AXEL W. PETERSON, OF DENVER, COLORADO.

SPECIFICATION forming part of Letters Patent N 0. 736,541, dated August18, 1903.

Application filed November 21, 1902. Serial No. 132,338. (No model.)

To (LU-whom it may concern:

Be it known that I, AXEL W. PETERSON, a citizen of the United States ofAmerica, residing at Denver, in the county of Arapahoe and State ofColorado, have invented certain new and useful Improvements in Means forAdj usting the Cross-Hairs of Gun-Telescopes; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompany. ingdrawings, and to the figures of reference marked thereon, which form apart of this specification.

My invention relates to improvements in means for adjusting cross-hairsof gun-telescopes to correspond or harmonize with the range or distanceof the target or other object aimed at by the user of the gun.

My object is to provide a device of this class which shall be readilyadj ustable,where by the horizontal cross-hair may be quickly andaccurately changed for varying ranges, and whose manipulation oradjustment shall require no special skill on the part of the user.

My further object is to provide a device which when applied to thetelescope shall be symmetrical and ornamental rather than unsightly orcumbersome.

Briefly stated, my improved device consists of a short barrel or sleeveinserted in the telescope-tube, in which barrel is vertically slidoneend and an adjustable set-ring at the opposite end, whereby it isjournaled on the telescope and has no movement back and forth when inthe regular performance of its function. 1

Having briefly outlined my improved constructi0n,as well as the functionit is intended to perform, I will proceed to describe the same indetail, reference being made to the accompanying drawings, in which isillustrated an embodiment thereof.

In the drawings, Figure 1 shows a gun with the telescope mounted thereonand equipped with my improvements. Fig. 2 is a fragmentary view of atelescope, showing the device on a larger scale. Fig. 3 is a sectiontaken through the telescope-tube and the barrel mounted therein andcarrying a spring-held slidable cross-hair frame. Fig. 4: is a view,partly in section and partly broken away, illustrating the completedevice. Fig. 5 is a cross-section taken on. the line 5 5, Fig. 4. Fig. 6is a section taken on the line 6 6, Fig. 4. Fig. 7 is a perspectivedetail view showing the barrel carrying the cross-hair frame and thespring-held slide for adjusting said frame. Figs. 8 and 9 show the saidslide and frame in detail. Fig. 10 illustrates the adjusting-ring, shownin elevation and section.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the telescopetube, within which is located ashort barrel 6, provided with a frame 7, carrying the horizontalcross-hair 8. This frame is provided with an elliptical openingvertically elongated or having its greater axis in a vertical position,so that the frame maybe adjusted within the required limits withoutobstructing in any degree the necessary sight-openin g of the telescope.In this barrel is formed a longitudinal recess 6, in which is located aleafspring 9, held in place by a screw 10. The extremity of this springremote from the screw 10 bears against the upper extremity of the frame8, which is provided with a shallow recess 8 to receive the end of thespring which normally holds the said frame in its lowest position. Inone side of the barrel is formed another longitudinal recess, in whichis located a slide 12, provided with a centrally-located pin 13 andhaving an inclined slot 14 formed in one extremity. The shell of thebarrel at one end is cut away at the top and bottom(see Fig. 7) topermit the frame 9 to move up and down without obstruction. A cap 15 isscrewed upon said cut-away extremity of the barrel, and itsinteriorly-projecting flange is provided with an opening to receive theslotted extremity of the said slide. The pin 13 of the slide passesthrough a straight slot formed in the telescope-tube and a registeringslot formed in the sleeve 16, applied to the telescope exteriorly. Thispin also projects beyond the sleeve 16 far enough to enter a spiralgroove 17, formed in the inner surface of a ring 18, exteriorlygraduated for convenience of adjustment in regulating the position ofthe horizontal cross-hair to correspond With the desired range. Thefigures shown on the graduated exterior surface of the ring 18 indicatehundreds of yards. This ring is regulated with reference to a mark 20,suitably placed on the stationary shoulder 16 of the sleeve 16, againstwhich shoulder the rear end of the adjusting-rim g abuts and preventsrearward movement of the ring. The rearward extremity of the sleeve 16is exteriorly threaded to receive a set-ring 19, adapted to abut againstthe ring 18 for the purpose of holding the latter tightly in place whenadjusted; but it may be loosened when it is desired to change theposition of the graduated rangering.

From the foregoing description the use and operation of my improveddevice will be readily understood. Assuming that the crosshair 8 isadjusted for a three-hundred-yard range or distance, the line adjacentthe numeral 3 on the ring 18 will be located in line with thepointer-mark 20 on the shoulder 16. Then if it is desired to regulatethe cross-hair for a greater range the ring 18 is turned in onedirection and if for a less range the ring is turned in the oppositedirection until the mark indicating the required range is brought intoline with the pointer marked 20.

The ring 18 for use on guns of different trajectories will bedifferently graduated-that is to say, the distance between thehundredyard marks will vary for use on guns of different trajectories.

In the foregoing description special reference has been made to theadjustment of the horizontal cross-hair of the telescope. It is evidentthat the vertical cross-hair may be operated by mechanism substantiallythe same as that herein described, and it is therefore the intention ofthis application to cover the adjustment of both cross-hairs of atelescope. The reason for adjusting the vertical cross-hair is to allowfor the influence of the wind on the bullet or projectile. Theshouldered sleeve 16 is secured in place on the telescope-tube by meansof a fastening-screw 16".

Having thus described my invention, What I claim is 1. In means foradjusting the cross-hair of a telescope, the combination of a devicemovably mounted in the telescope-tube and carrying the cross-hair to beadjusted, a ring mounted exteriorly on the telescope, and a suitableconnection between the ring and the movable cross-hair-carrying device,whereby as the ring is turned the cross-hair is adjusted.

2. In means foradjusting the cross hair or wire of a telescope, thecombination of a device movable transversely in the telescopetube andcarrying the cross hair or wire to be adjusted, said device having alateral projection, a longitudinally-movable slide mounted in thetelescope and having an inclined slot into which the projection of thecross-haircarrying device protrudes, the said slide having a pin passingthrough a straight slot in the tube of the telescope, a ring mountedexteriorly on the telescope and having a spiral groove or way which thepin ofthe slide engages, 'whereby as the ring is turned the slide andthe cross-hair-carrying device are actuated.

3. The combination of an open cross-haircarrying frame slidabletransversely in the telescope, a spring engaging said frame, a slidelongitudinally movable in the telescopetube and provided with aninclined slot and an outwardly-projecting pin passing through a straightslot in the telescope, the said frame having a lateral projectionengaging the inclined slot of the slide, and a ring journaled exteriorlyon the telescope and having a spiral groove or way into which the saidpin projects whereby as the ring is turned the slide is actuated. tomove the said frame against the holding tendency of the spring.

L. The combination of a barrel inserted in the telescope-tube, across-haircarrying frame slidable transversely in said barrel andprovided with a lateral projection, a spring carried by the barrel andengaging said frame, a part mounted to slide in a longitudinal recessformed in the barrel and having an inclined slot and anoutwardly-projecting pin passing through a straight slot formed in thetelescope-tube, the projection of the frame, engaging the inclined slotof the said sliding part, and a ring journaled exteriorly on thetelescope and having a spiral groove or way into which the said pin ofthe sliding part protrudes.

5. The combination with a telescope, of a cross-hair-carrying devicemounted to move ICC transversely therein, a ring journaled exteriorly onthe telescope, a suitable connection between the ring and thecross-hair-carrying device whereby as the ring is actuated the ring andthe slide and the cross-hair-carrying said device is operated asdescribed, the said device, whereby as the ring is actuated the ringbeing graduated toindicate range measslide and cross-hair-carryingdevice are actuurements, a shoulder against'which the ring ated at rightangles to each other, substanabuts, and a set-ring screwed onto theteletially as described.

scope to hold the graduated ring in the ad- In testimony whereof I affixmy signature justed position. in presence of two witnesses.

6. The combination With a telescope, of a T cross-hair-carrying devicemovably mounted ALEL PETERSON therein, a slide also movably mountedtherein, a ring journaled exteriorly on the telescope, and a suitableconnection between the Witnessesi DENA NELsoN, A. J. OBRIEN.

